Engine.



E. I. HUNTER.

ENGINE. APFLICAUON FILED APR. 18. 1914.

Patented Aug. 10, 1915.

E" HUNTER,

ELBEBT I. HUNTER, OF STEPHENVILLE, TEXAS.

ENGINE.

Specification of Letters ZEatent.

Application filed April 18, 1914. Serial No. 832,839.

To all whom it may concern:

Be it known that I, ELBERT I. HUNTER, citizen of the United States,residing at Stephenville, in the county of Erath and State of Texas,have invented .certain new and useful Improvements in Engines, of whichthe following is a specification, reference being had to theaccompanying drawin l his invention relates to improvements in gasengines and more particularly to an improved construction andarrangement of the engine cylinders in pairs, each of said cylindersbeing provided with a piston therein,

said pistons being arranged upon a common operating rod connected to thecrank shaft, the driving force being applied simulta neously to thepiston heads at the corresponding sides thereof whereby the crank shaftis continuously and positively driven.

The primary object of the invention resides in the provision of improvedmeans for mounting the pistons in the engine cylinders and admitting theexplosive charge simultaneously to the corresponding ends of saidcylinders whereby, in the event that the charge in one cylinder is notignited, the ex plosion of the charge in the other cylinder will operateupon the piston therein and thus insure the transmission of a positivedriving force to the engine shaft.

My invention has for a further object to provide an improvedconstruction of gas engine which is extremely simple, may bemanufactured at small cost and is highly reliable and efficient inpractical operation.

With the above and other objects in view as will become apparent as thedescription proceeds, the invention consists-in"certain. constructions,combinations and arrangements of the parts that I shall hereinafterfully describe and claim.

For -a full understanding of the invention, reference is to be had tothe following description and accompanying drawing, in which Figure 1 isa longitudinal section through the connected engine cylinders showingthe arrangement of the pistons therein. Fig. 2 is a sectiontaken on theline 22- of Fig. 1; Fig. 3 is an enlarged detail view of the piston rod.

Referring in detail to the drawings, 5 designates the spaced enginecylinders which are provided with water jackets 6. The opposed ends ofthese cylinders are connected by the concentrically arranged sleeves?and 8 which are integrally formed with the hollow circular heads 9 attheir ends, said heads being secured to the ends of the respectivecylinders. These spaced sleeves and the heads 9 provide an additionalwater space 10. The outer end of each, cylinder is aso er 1 providedwith a head 11 having a we space 12. The head 11 on one cylinder isformed with a double walledst'em or sleeve 13, said walls at their outerends being in- Patented Aug. 10, 1915. I

tegrally connected to close the water space between said sleeves.

The piston rod indicated at 14 is mounted for longitudinal reciprocatorym vement through the inner tubular sleeve 8 between the engine cylindersand through the doublewalled stem or sleeve 13 on the cylinder head 11.Upon one end of this rod, the piston head 15 is arranged, said headengaging a' stop flange or collar 16. The extremity 'of the rod isthreaded to receive a nut 17 whereby the piston head is retained inconnection with said rod. A. second,- iston head 18 is also arrangedupon the re. 14 for operation in the other of the engine cylinders, saidrod having a threadedv portion intermediate of its ends to receive asectional nut.

19 whereby the piston head is held against v an annular flange 0r collar20 on said r d.

At the proper point on the piston rod the same is formed with the spacedperipheral flanges 21 between which suitable packing rings 22 areadapted to be arranged. 'These packing rings frictionally'engage thewall of the sleeve 8 and the inner wall of the sleeve 13 respectivelyfor a purpose which willbe obvious.

Intake and exhaust ports 23 are provided in the opposite ends of eachcylinder. 2 L designates. valve chambers with which the respective portscommunicate. Each of the valve chambers 2a is provided with an intake"and exhaust valve (not shown). The valve chambers 24 are connected bypipes 25 to a manifold 26 which in turn is connected to a carbureter 27.This manifold is provided with the usual valve operated from thegovernor of the engine whereby the quantity of gas'supplied tothe-engine cylinder is automaticallyiregulated in accordance with theload. Each of the valve chambers 24 -is further provided with a sparkplug oil supply means is also provided to supply oil to the hearings onthe piston rods in the sleeves 8 and 13.

la the practical operation of the engine, the gas having been admittedto the corresponding ends of the respective cylinders, and compressed bythe pistons 15, the charges are simultaneously exploded so as to reversethe movement of the pistons 15 and 18 in the respective cylinders. Ifthe explosion fails to take place in one cylinder, the explosion of thegas in the other cylinder will insure the application of the drivingforce to the piston rod, so that the crank shaft of the engine will becontinuously driven. After the explosion in one end of the cylinder, thegas is admitted through the port at the opposite end of the cylinder sothat the same will be compressed and when the piston has completed itsstroke, in one direction, this new charge is exploded to reverse themovement oif the piston. It Will thus be apparent that by providing thecylinders arranged in pairs and the double piston,'a maximum of drivingforce is obtained and the positive and continuous opration of the engineassured. lit will also be appreciated that by the provision of the largewater space, the engine cylinders and pistons are rapidly cooled.

From the foregoing desdiiiption taken in.

' connection. with the accompanying drawing, it is believed thatthe-construction, manner of operation and several advantages of myinvention will be clearly and fullyundersteod. The device is simple inits construction, positive and reliable in its operation and providesmeans whereby a continuous and steady power may be derived in the use ofexplosive gas as the operating medium. it will of course be understoodthat the various accessories; necessary in the successful operation ofthis type of engine will he provided, but as same constitute no part ofthe present invention, the specific description thereof is deemedunnecessary.

While I have shown the preferred form and construction of the severalparts employed, it will be understood that the invention is susceptibleof considerable modification therein and I therefore reserve theprivilege of resorting to all such legitimate changes as may be fairlyembodied within the spirit and scope of the invention as claimed.

Having thus described the invention, What is claimed is: i

1. In an engine, spaced engine cylinders, a double-wall sleeve havingenlarged chambered ends detachably secured to the 0pposed ends of thecylinders and constituting heads therefor, a reciprocating piston rodmovable through the bore of the sleeve, and pistons fixed upon said rodto reciprocate in the respective cylinders.

.3. in an engine, spaced engine cylinders, integrally connectedchambered heads detachably secured to the opposed ends of saidcylinders, the connection between said heads having a longitudinal borecommunicating at its opposite ends with the respective cylinders, water'jacketed heads secured upon.

the other. ends of the cylinders, one of said heads having an elongateddouble walled sleeve integrally formed therewith, a piston rod extendingthrough the bore of said connected heads and through said sleeve,

packing rings secured upon said rod for trictional engagement With theWall of said sleeve and said borerespectively, and pistons fixed uponsaid rod to reciprocate in the respective cylinders.

In testimony whereof I hereunto afi ix my signatrre in the presence oftwo Witnesses. ELBERT I. HUNTER. l i itnesses i. P. Box, C FnneUsoN.

